BM81004MUV Datasheet, PDF (1/52 Pages) Rohm – Positive charge pump controller

Datasheet
Power supply IC series for TFT-LCD panels
12V Input Multi-Channel
System Power Supply IC
BM81004MUV
General Description
BM81004MUV is a system power supply for TFT-LCD
panels used for liquid crystal TVs. This IC is
incorporated with Negative and Positive charge pump
controller and Gate Pulse Modulation (GPM) function. It
also features built-in EEPROM to contain each setting
voltage, soft start time etc.
Features
■ Step-up DC/DC converter (AVDD).
(Synchronous rectification, Built-in load switch).
■ Step-down DC/DC converter 1(VIO).
(Non-synchronous rectification).
■ Step-down DC/DC converter 2(VCORE).
■ Step-down DC/DC converter 3(HAVDD).
(Synchronous rectification).
■ Positive charge pump controller (VGH).
■ Negative charge pump controller (VGL).
■ Gate Pulse Modulation (GPM) function.
■ High Voltage LDO (50mA)
■ 10 bit DAC-controlled Gamma Amplifier 4ch
■ 8 bit DAC-controlled VCOM Amplifier
■ Output voltage control by I2C.
■ Built-in EEPROM.
■ Switching Frequency 750kHz (AVDD, VIO).
■ Switching Frequency 1MHz (VCORE, HAVDD).
Applications
■ TFT-LCD panel
Typical Application Circuit 1
（TOP VIEW）
SW
VGH
Key Specifications
 Input voltage range：
 AVDD Output voltage range：
 VIO Output voltage range：
 HAVDD Output voltage range：
 VGH Output voltage range：
 VGL Output voltage range：
 Switching Frequency：
 Operating temperature range：
8.6V to 14.0V
11.7V to 18.0V
2.2V to 3.7V
4.8V to 11.1V
25V to 40.5V
-10.2V to -4.0V
750kHz(Typ)
1MHz(Typ)
-40℃ to +105℃
Package
VQFN48V7070A
W(Typ) x D(Typ) x H(Max)
7.00mm x 7.00mm x 1.0mm
SW
AVDD
HAVDD
VIN
VCORE
VIO
PGND2
SWB2
VDD2
VINB2
VINB1
VINB1
N.C.
SWB1
SWB1
AMPGND
AMP4
AMP3
BM81004MUV
PGATE
AVDDS
SWO
SWI
SW
SW
PGND
PGND
VL
COMP
AGND
CTRL
SWB1
VGL
AVDD
VIN
VIN
AVDD
Figure 1. Application Circuit 1
○Product structure：Silicon monolithic chip ○This chip is not designed for protection against ratio active rays.
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TSZ02201-0313AAF00420-1-2
4.Dec.2014 Rev.002